Finish:Asphalt Goal Low Back Armless Task Chair Substantial upholstery and cushioning treatment Single lever operator control allowing adjustment of both seat and back angles Ergonomic Features: Seat Height: Raise or lower to allow your feet to rest flat on the floor. Avoids pressure under your thighs, easing blood flow. Back Height: Raise or lower to position lumbar support in your lumbar area. Reduces likelihood of back pain. Seat Depth: Change the depth of the seat to accommodate the length of your thighs. Keeps your back in contact with the backrest while avoiding pressure behind your knees.